zipper

Abstract

The present invention relates to a slide fastener (1) including a pair of first and second slide fastener tapes (10, 20), a first chain (50), and a second chain (60). When the first chain (50) and the second chain (60) are engaged with each other, a widthwise end portion (10a) of the first slide fastener tape (10) and a widthwise end portion (20a) of the second slide fastener tape (20) are respectively pressed and curved into arc shapes to be in close contact with each other.

Description

TECHNICAL FIELD

[0001] The present application relates to a zipper. BACKGROUND

[0002] As a kind of zipper, generally known are: a normal type of zipper attached in a manner that a chain tape row is visible on the outer side (front side) of an article, a reverse type of zipper (so-called reverse zipper) in which a chain tape row is attached to the inner side (back side) of an article so as to be difficult to see, a hidden type of zipper (so-called hidden zipper) in which the side edge portions of left and right zipper tapes are folded back in a U shape in the width direction thereof and a chain tape row is attached to the folded back tape portions, and the like.

[0003] The reverse zipper is advantageous in that it does not hinder the design of an article due to its concealment, and is suitable for use in various articles of clothing or shoes, bags, furniture, and the like, and in recent years, is also used in various seat covers for seats of automobiles, trains, airplanes, and the like. An example of such a reverse zipper is disclosed in Japanese Patent Laid-Open No. 2009-56076 (Patent Document 1).

[0004] Figure 8 is a sectional view showing the reverse zipper of Patent Document 1. As shown in Figure 8 the reverse zipper 100 disclosed in Patent Document 1 has a pair of left and right zipper tape 102, 102, and a puller 101 capable of opening and closing the pair of left and right zipper tape 102, 102.

[0005] The puller 101 has a puller main body 110 and a pull tab 120. The puller main body 110 has: an upper wing plate 111, a lower wing plate 112 disposed apart from and parallel to the upper wing plate 111, a guide post (not shown in the figure) linking the front end portions of the upper and lower wing plates 111, 112, a pull tab mounting post 114 of a door shape formed integrally with the surface (upper surface) of the upper wing plate 111, and left and right flanges 115 erected toward the upper wing plate 111 from the left and right side edges of the rear portion side of the lower wing plate 112. Figure 8

[0006] The pair of left and right zipper tape 102, 102 is formed by sewing a chain tape row 103 in which a core wire 106 is inserted through a coil-like chain tape row 103 to the opposite tape side edge portions of a pair of left and right zipper tape 104, 104 with a sewing thread 105.

[0007] [Related Art Documents]

[0008] [Patent Documents]

[0009] Patent Document 1: Japanese Patent Laid-Open No. 2009-56076 SUMMARY

[0010] [Problems to be Solved by the Invention] ​

[0011] Generally, in a reverse fastener, a gap (so-called middle partition) is formed between a pair of left and right fastener tapes. Actually, even in Figure 8 In the reverse fastener 100 of Patent Document 1 shown, a gap S is formed between a pair of left and right fastener tapes 104, 104.

[0012] Therefore, in a case where an external force in a direction away from each other (so-called lateral pull) is applied to the pair of left and right fastener tapes 104, 104, when a user observes the reverse fastener 100 from the surface side (the upper side of FIG. 1), the chain tooth row 103 is visible through the gap S. Such a decrease in the concealment of the chain tooth row 103 deteriorates the design property of an article using the reverse fastener 100, particularly an article such as a car seat, a bag, furniture, and the like, which values the appearance, and is not preferable in terms of this aspect. Figure 8

[0013] The present application was made in view of the above-described problems, and aims to provide a fastener in which the concealment of a chain tooth row is excellent, and further the appearance is excellent.

[0014] [Technical means for solving the problems]

[0015] To solve the problems, the present application is achieved by the following structure.

[0016] [1] A fastener comprising:

[0017] a pair of first and second fastener tapes each having a first major surface and a second major surface opposite to the first major surface, and each having a strip shape;

[0018] a first chain tooth row provided on the first major surface of one end portion in the width direction of the first fastener tape; and

[0019] a second chain tooth row provided on the first major surface of one end portion in the width direction of the second fastener tape, and

[0020] when the first and second chain tooth rows are engaged with each other, the one end portion in the width direction of the first fastener tape and the one end portion in the width direction of the second fastener tape are respectively pressed and curved into an arc shape to be in close contact with each other.

[0021] [2] The fastener according to [1], wherein

[0022] when the first and second chain tooth rows are engaged with each other, the second major surface of the one end portion in the width direction of the first fastener tape and the second major surface of the one end portion in the width direction of the second fastener tape are in close contact with each other.

[0023] [3] The fastener according to [1] or [2], wherein ​

[0024] a first space is formed between the first major surface of the one end portion in the width direction of the first slide fastener tape and the first chain tooth row,

[0025] a second space is formed between the first major surface of the one end portion in the width direction of the second slide fastener tape and the second chain tooth row.

[0026] [4] The slide fastener according to [1] or [2], wherein

[0027] the first slide fastener tape and the second slide fastener tape are fabric or knitted fabric.

[0028] [5] The slide fastener according to [1] or [2], wherein

[0029] the one end portion in the width direction of the first slide fastener tape extends further toward the second slide fastener tape than the center of engagement of the first chain tooth row and the second chain tooth row, and the one end portion in the width direction of the second slide fastener tape extends further toward the first slide fastener tape than the center of engagement, whereby the one end portion in the width direction of the first slide fastener tape and the one end portion in the width direction of the second slide fastener tape are pressed and curved into an arc shape to be in close contact with each other when the first chain tooth row and the second chain tooth row are engaged with each other.

[0030] [6] The slide fastener according to [5], wherein

[0031] the one end surface in the width direction of the first slide fastener tape and the one end surface in the width direction of the first chain tooth row are disposed on the same plane, and the one end surface in the width direction of the second slide fastener tape and the one end surface in the width direction of the second chain tooth row are disposed on the same plane, whereby the one end portion in the width direction of the first slide fastener tape and the one end portion in the width direction of the second slide fastener tape are pressed and curved into an arc shape to be in close contact with each other when the first chain tooth row and the second chain tooth row are engaged with each other.

[0032] [7] The slide fastener according to [1] or [2], comprising:

[0033] a first water stopping layer provided on the second major surface of the first slide fastener tape; and

[0034] a second water stopping layer provided on the second major surface of the second slide fastener tape.

[0035] [8] The slide fastener according to [7], wherein

[0036] the one end portion in the width direction of the first water stopping layer and the one end portion in the width direction of the second water stopping layer are pressed and curved into an arc shape to be in close contact with each other when the first chain tooth row and the second chain tooth row are engaged with each other.

[0037] [9] The fastener according to [8], wherein

[0038] The first and second water-stopping layers each include a first water-stopping main surface which is in contact with the second main surface of the first and second fastener tapes, and a second water-stopping main surface which is on the opposite side of the first water-stopping main surface,

[0039] The second water-stopping main surface of the one end portion in the width direction of the first water-stopping layer and the second water-stopping main surface of the one end portion in the width direction of the second water-stopping layer are in close contact with each other when the first and second rows of fastener elements are engaged with each other.

[0040] [Effects of the Invention]

[0041] According to the fastener of the present application, the one end portion in the width direction of the first fastener tape and the one end portion in the width direction of the second fastener tape are respectively curved into an arc shape and are in close contact with each other when the first and second rows of fastener elements are engaged with each other. Therefore, the gap (middle separation portion) between the first and second fastener tapes disappears, the concealability of the rows of fastener elements is excellent, and furthermore, the appearance is excellent. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a surface view of the first embodiment of the fastener of the present application.

[0043] Figure 2 is a surface view of the first embodiment of the fastener of the present application. Figure 1 is a main part cross-sectional view of the fastener shown in FIG. 1, and is a view showing a state in which the first and second rows of fastener elements are engaged with each other.

[0044] Figure 3 is a main part cross-sectional view of the fastener shown in FIG. 1, and is a view showing a state in which the first and second rows of fastener elements are separated from each other. Figure 1

[0045] Figure 4 is a main part cross-sectional view of the fastener of the first embodiment of the present application, and is a view showing a state in which the first and second rows of fastener elements are engaged with each other.

[0046] Figure 5 is a main part cross-sectional view of the fastener of the second embodiment of the present application, and is a view showing a state in which the first and second rows of fastener elements are engaged with each other.

[0047] Figure 6 is a main part cross-sectional view of the fastener of the second embodiment of the present application, and is a view showing a state in which the first and second rows of fastener elements are separated from each other.

[0048] Figure 7 is a main part cross-sectional view of the fastener of the second embodiment of the present application, and is a view showing a state in which the first and second rows of fastener elements are engaged with each other.​

[0049] Figure 8 is a sectional view showing a reverse fastener of Patent Document 1.

[0050] [Explanation of symbols]

[0051] 1: fastener

[0052] 3, 5: fastener tape

[0053] 10: first fastener tape

[0054] 10a: widthwise one end portion

[0055] 10b: widthwise one end surface

[0056] 11: back surface (first major surface)

[0057] 13: surface (second major surface)

[0058] 20: second fastener tape

[0059] 20a: widthwise one end portion

[0060] 20b: widthwise one end surface

[0061] 21: back surface (first major surface)

[0062] 23: surface (second major surface)

[0063] 31: element

[0064] 31a: engagement head

[0065] 31b: first leg portion

[0066] 31c: second leg portion

[0067] 31d: connecting portion

[0068] 31e: widthwise one end surface

[0069] 31f: widthwise one end surface

[0070] 32: core thread

[0071] 33: sewing thread

[0072] 40: slider

[0073] 41: main body

[0074] 42: pull tab mounting portion

[0075] 43: pull tab

[0076] 50: first element row

[0077] 60: second chain row

[0078] 70: first water stop film (first water stop layer)

[0079] 70a: widthwise one end portion

[0080] 70b: widthwise one end surface

[0081] 71: back surface (first water stop main surface)

[0082] 73: surface (second water stop main surface)

[0083] 80: second water stop film (second water stop layer)

[0084] 80a: widthwise one end portion

[0085] 80b: widthwise one end surface

[0086] 81: back surface (first water stop main surface)

[0087] 83: surface (second water stop main surface)

[0088] 100: reverse fastener

[0089] 101: puller

[0090] 102: fastener tape

[0091] 103: chain row

[0092] 104: fastener tape

[0093] 105: sewing thread

[0094] 106: core thread

[0095] 110: puller main body

[0096] 111: upper wing plate

[0097] 112: lower wing plate

[0098] 114: puller tab mounting column

[0099] 115: flange

[0100] 120: puller tab

[0101] O: engagement center

[0102] O1, O2: position

[0103] S: gap

[0104] S1, S2: plane

[0105] T1: first space

[0106] T2: second space DETAILED DESCRIPTION

[0107] Hereinafter, the slider of each embodiment of the present application will be described in detail based on the drawings.

[0108] Further, in the present specification, with respect to the slider, the so-called "vertical direction" is the sliding direction of the slider, and refers to the longitudinal direction of the slider, and in particular, the direction in which the slider is slid so that the left and right rows of teeth engage is set as the "upper side", and the direction in which the slider is slid so that the left and right rows of teeth are separated is set as the "lower side".

[0109] Further, with respect to the slider, the so-called "horizontal direction" is the direction in which the pair of rows of teeth are arranged, and is the direction orthogonal to the sliding direction of the slider, and can also be said to be the width direction of the slider.

[0110] Further, with respect to the slider and the stopper, the so-called "front-rear direction" is the direction orthogonal to the vertical direction and the horizontal direction, and can also be said to be the thickness direction of the slider tape or the height direction of the row of teeth.

[0111] (First Embodiment)

[0112] Figure 1 is a surface view of the first embodiment of the slider of the present application. Figure 2 is a main part cross-sectional view of the slider shown in Figure 1 , and is a view showing the state in which the first row of teeth and the second row of teeth are engaged. Figure 3 is a main part cross-sectional view of the slider shown in Figure 1 , and is a view showing the state in which the first row of teeth and the second row of teeth are separated.

[0113] As shown in Figures 1-3 , the slider 1 of the present embodiment includes a pair of left and right slider tapes 3, 5, and a slider 40 capable of opening and closing the pair of left and right slider tapes 3, 5.

[0114] The pair of left and right slider tapes 3, 5 include a pair of left and right first slider tape 10 and second slider tape 20, which are long in shape and each have a back surface 11, 21 (first main surface) and a surface 13, 23 (second main surface) on the opposite side of the back surface 11, 21; a first row of teeth 50 provided on the back surface 11 of the widthwise one end portion 10a (right end portion) of the first slider tape 10; and a second row of teeth 60 provided on the back surface 21 of the widthwise one end portion 20a (right end portion) of the second slider tape 20. Figure 2 Figure 2 ​the back surface 21 of the width direction one end portion of the first zipper tape 10 and the width direction one end portion of the second zipper tape 20. Thereafter, the side in the width direction of the first zipper tape 10 and the second zipper tape 20 on which the chain column is provided is defined as the width direction one end side, and the side on which the chain column is not provided is defined as the width direction other end side.

[0115] The first zipper tape 10 and the second zipper tape 20 are fabric or braiding including polyester thread or the like and are excellent in softness. In addition, the first zipper tape 10 and the second zipper tape 20 can also be nonwoven fabric.

[0116] The slider 40 engages and disengages the left and right pair of the first chain column 50 and the second chain column 60. The slider 40 includes a main body 41, a pull tab mounting portion 42 provided on the surface of the main body 41, and a pull tab 43 mounted to the pull tab mounting portion 42. Further, by moving the slider 40 upward, as shown in Figure 2 , the left and right pair of the first chain column 50 and the second chain column 60 are engaged, and by moving the slider 40 downward, as shown in Figure 3 , the left and right pair of the first chain column 50 and the second chain column 60 are disengaged. In addition, the zipper 1 can also include an upper stop portion or a lower stop portion, which are not shown. In addition, instead of the lower stop portion, an opening piece having a seat rod and a seat body can be provided.

[0117] The first chain column 50 and the second chain column 60 are coil-shaped zipper chain columns formed by winding a monofilament made of synthetic resin in a certain direction, and have a plurality of chain teeth 31. Further, with respect to the first chain column 50 and the second chain column 60, a core wire 32 is inserted into the inside of the plurality of chain teeth 31, and is sewn to the back surface 11 of the width direction one end portion 10a of the first zipper tape 10 and the back surface 21 of the width direction one end portion 20a of the second zipper tape 20 using a lock stitch thread 33. In addition, as the synthetic resin material of the monofilament, polyester and nylon or the like can be cited.

[0118] The chain tooth 31 includes: an engagement head portion 31a, which engages and disengages with the chain tooth 31 of the other side; a first leg portion 31b, which extends from the surface side end portion of the engagement head portion 31a to the width direction other end side and contacts the first zipper tape 10 and the second zipper tape 20; a second leg portion 31c, which extends from the back side end portion of the engagement head portion 31a to the width direction other end side and does not contact the first zipper tape 10 and the second zipper tape 20; and a connecting portion 31d, which connects the width direction outer end portion of the first leg portion 31b and the width direction other end portion of the second leg portion 31c of the adjacent chain tooth 31. Therefore, the first leg portion 31b and the second leg portion 31c are formed so as to protrude from the engagement head portion 31a and extend in parallel.

[0119] The engagement center O of the first chain column 50 and the second chain column 60 is shown in Figure 2 . The engagement center O is the center position of the chain tooth 31 when the chain tooth 31 engages with the chain tooth 31 of the other side, and coincides with the width direction center of the zipper 1. In the first chain column 50 and the second chain column 60, theFigure 3 O1 and O2 indicate the positions of the engagement center O when the first chain tooth row 50 and the second chain tooth row 60 are engaged. Positions O1 and O2 are located on the other end side in the width direction, further than the engagement head 31a of the chain tooth 31.

[0120] like Figure 3 As shown, when the first zipper tooth row 50 and the second zipper tooth row 60 are separated, the width direction end 10a of the first zipper tape 10 and the width direction end 20a of the second zipper tape 20 are separated from each other in the width direction.

[0121] In addition, Figure 1 In the upper part, with the first zipper tooth 50 and the second zipper tooth 60 separated, the width-direction end 10a of the first zipper tape 10 and the width-direction end 20a of the second zipper tape 20 are shown as bent into an arc shape. This indicates that when the first zipper tooth 50 and the second zipper tooth 60 are separated after a certain period of engagement, traces of the bent shape remain. When the first zipper tooth 50 and the second zipper tooth 60 are separated for a certain period of time, the bent shape is eliminated, and the width-direction end 10a of the first zipper tape 10 and the width-direction end 20a of the second zipper tape 20 sometimes also become... Figure 3 The approximate planar shape shown.

[0122] like Figure 3 As shown, in the state where the first zipper tooth row 50 and the second zipper tooth row 60 are separated, the width-direction end 10a of the first zipper tape 10 extends further towards the second zipper tape 20 (width-direction end side) than the position O1 that forms the engagement center O between the first zipper tooth row 50 and the second zipper tooth row 60, and the width-direction end 20a of the second zipper tape 20 extends further towards the first zipper tape 10 (width-direction end side) than the position O2 that forms the engagement center O. That is, it is designed such that... Figure 2 When the first zipper tooth row 50 and the second zipper tooth row 60 are engaged as shown, the first zipper tape 10 and the second zipper tape 20 overlap with the engagement center O. By arranging the first zipper tape 10 and the second zipper tape 20, as well as the first zipper tooth row 50 and the second zipper tooth row 60, as described above, when the first zipper tooth row 50 and the second zipper tooth row 60 are engaged as described later, the first zipper tape 10 and the second zipper tape 20 can be bent into an arc shape and closely connected to each other.

[0123] More specifically, in a state in which the first chain row 50 and the second chain row 60 are separated, the width direction one end surface 10b of the first zipper tape 10 is disposed on the second zipper tape 20 side (width direction one end side) than the position O1 which is the engagement center O, and the width direction one end surface 20b of the second zipper tape 20 is disposed on the first zipper tape 10 side (width direction one end side) than the position O2 which is the engagement center O.

[0124] The width direction one end surface 10b of the first zipper tape 10 can be disposed at a position overlapping at least a part of the engagement head portion 31a of the chain 31 in the width direction, can be disposed on the same plane S1 as the width direction one end surface 31e of the engagement head portion 31a (i.e., the width direction one end surface of the first chain row 50), or can be disposed on the second zipper tape 20 side than the engagement head portion 31a. Figure 2 In the example of FIG. 6, the width direction one end surface 10b of the first zipper tape 10 is disposed on the same plane S1 as the width direction one end surface of the first chain row 50 in the width direction.

[0125] The width direction one end surface 20b of the second zipper tape 20 can be disposed at a position overlapping at least a part of the engagement head portion 31a of the chain 31 in the width direction, can be disposed on the same plane S2 as the width direction one end surface 31f of the engagement head portion 31a (i.e., the width direction one end surface of the second chain row 60), or can be disposed on the first zipper tape 10 side than the engagement head portion 31a. Figure 2 In the example of FIG. 6, the width direction one end surface 20b of the second zipper tape 20 is disposed on the same plane S2 as the width direction one end surface of the second chain row 60 in the width direction.

[0126] Thus, with the first zipper tooth row 50 and the second zipper tooth row 60 separated, the width-direction end face 10b of the first zipper tape 10 and the width-direction end face of the first zipper tooth row 50 are arranged on the same plane S1, and the width-direction end face 20b of the second zipper tape 20 and the width-direction end face of the second zipper tooth row 60 are arranged on the same plane S2. Therefore, when the first zipper tooth row 50 and the second zipper tooth row 60 are engaged as described later, the first zipper tape 10 and the second zipper tape 20 can be more reliably bent into an arc shape and closely connected to each other. This is because the width-direction end faces 10a and 20a of the first zipper tape 10 and the second zipper tooth row 20 do not hinder the engagement of the first zipper tooth row 50 and the second zipper tooth row 60, and the press-fit between the first zipper tape 10 and the second zipper tooth row 20 is less likely to break. Furthermore, the phrase "configured on the same plane" does not necessarily mean that they are completely configured on the same plane. Considering the taper of the engagement head 31a, it also includes the case where the width direction end face 10b and width direction end face 20b of the first zipper tape 10 and the second zipper tape 20 are approximately on the same plane as the range from the start point to the end point of the taper of the engagement head 31a.

[0127] By pulling the 40 from Figure 3 As shown, the first chain tooth 50 and the second chain tooth 60 are separated and move upwards, as... Figure 2 As shown, the first zipper tooth row 50 and the second zipper tooth row 60 engage. At this time, the width-direction end 10a of the first zipper tape 10 extends further towards the second zipper tape 20 (width-direction end side) than the position O1 that becomes the engagement center O of the first zipper tooth row 50 and the second zipper tooth row 60, and the width-direction end 20a of the second zipper tape 20 extends further towards the first zipper tape 10 (width-direction end side) than the position O2 that becomes the engagement center O. Therefore, the width-direction end 10a and the width-direction end 20a are squeezed and deformed against each other in the width direction, bending into an arc shape that bulges outward and closely contacts each other. Furthermore, at this time, as Figure 2 As shown, the seam 33 sewn onto the first zipper tape 10 and the second zipper tape 20, and onto the side of the first zipper tape 10 and the second zipper tape 20 at one end 10a and the other end 20a in the width direction, sometimes stretches slightly and floats up as the first zipper tape 10 and the second zipper tape 20 are compressed.

[0128] Thus, when the first chain teeth row 50 and the second chain teeth row 60 are engaged with each other, the first zipper tape 10 and the second zipper tape 20 are in close contact with each other, and therefore, a gap (so-called middle separation portion) is not formed between the first zipper tape 10 and the second zipper tape 20 as in the case of the conventional reverse installation zipper. Therefore, when a user observes the zipper 1 from the surface side, the first chain teeth row 50 and the second chain teeth row 60 cannot be visually recognized, and the appearance is excellent. Such a zipper 1 is particularly suitable for articles in which appearance is valued, such as automobile seats, bags, furniture, and the like.

[0129] In addition, since the first zipper tape 10 and the second zipper tape 20 are in close contact with each other by being bent into an arc shape, even when a force in a direction in which the first zipper tape 10 and the second zipper tape 20 are apart from each other (so-called cross pull) is applied to the first zipper tape 10 and the second zipper tape 20, the engagement gaps of the chain teeth 31 with each other are canceled out, and therefore, the close contact state of the first zipper tape 10 and the second zipper tape 20 can be maintained only by slightly reducing the degree of bending, and thus, the excellent appearance of the zipper 1 can be maintained.

[0130] Further, a waterproof agent can be attached to the first zipper tape 10 and the second zipper tape 20. By attaching the waterproof agent, the zipper 1 can be provided with waterproof properties. As the waterproof agent, for example, a fluorine-based compound, a silicone-based compound, an acrylic-based waterproof agent, a silicone composite-based waterproof agent, a paraffin-based compound, an ethylene urea-based compound, a zirconium-based compound, a fatty acid amide-based compound, a hydroxymethyl amide-based compound, an alkyl urea type, a fatty acid amide type, and the like can be used.

[0131] The process of attaching the waterproof agent to the first zipper tape 10 and the second zipper tape 20 can be applied to any process, and for example, the waterproof agent can be impregnated by winding and guiding the zipper tape 3, the zipper tape 5 along the circumferential surface of a guide roller not shown so as to continuously pass through a container filled with the waterproof agent. In this process, the waterproof agent is efficiently applied to the entire surface of the first zipper tape 10 and the second zipper tape 20, the first chain teeth row 50 and the second chain teeth row 60, the core wire 32, and the stitching wire 33 that constitute the zipper tape 3 and the zipper tape 5. Subsequently, the zipper tape 3 and the zipper tape 5 are lifted from the container and continuously passed through a drying chamber, and thus, the waterproof agent applied to the entire surface of the zipper tape 3 and the zipper tape 5 is first dried. Thereafter, the zipper tape 3 and the zipper tape 5 after the waterproof agent has been dried are further continuously passed through a heat treatment chamber, and thus, the dried waterproof agent is subjected to heat treatment. In the heat treatment, fusion and attachment processing are performed between all substrates and the waterproof agent of the first zipper tape 10 and the second zipper tape 20, the first chain teeth row 50 and the second chain teeth row 60, the core wire 32, and the stitching wire 33.

[0132] Thus, when the first zipper tape 10 and the second zipper tape 20 are waterproofed, the zipper 1 can be used as a waterproof zipper. In particular, in this embodiment, since the first zipper tape 10 and the second zipper tape 20 are bent into an arc shape and closely connected to each other when the first zipper tooth row 50 and the second zipper tooth row 60 are engaged, no gap (middle partition) is formed between the first zipper tape 10 and the second zipper tape 20, and liquid can be prevented from entering from the middle partition as in the prior art.

[0133] In addition, such as Figure 2 As shown, when the first zipper tooth row 50 and the second zipper tooth row 60 are engaged, the width-direction end faces 10b and 20b of the first zipper tape 10 and the second zipper tape 20 face the zipper tooth 31 side (back side) and abut against the first zipper tooth row 50 and the second zipper tooth row 60. Furthermore, the surface 13 of the width-direction end 10a of the first zipper tape 10 and the surface 23 of the width-direction end 20a of the second zipper tape 20 are in close contact at the engagement center O. Thus, the width-direction end faces 10a, 20a, and 20a of the first zipper tape 10 and the second zipper tape 20 are in close contact with each other. Therefore, compared to the case where the back faces 11 and 21 are in close contact (where the width-direction end faces 10a and 20a are bent in the opposite direction to this embodiment), the thickness of the zipper 1 can be suppressed, and the sliding resistance of the zipper head 40 can be reduced. Furthermore, assuming that the back 11 and back 21 are closely connected to each other, the width direction end face 10b and width direction end face 20b of the first zipper tape 10 and the second zipper tape 20 face the surface side, and the width direction end face 10a and width direction end face 20a, which are the edges of the tape, face the surface and become convex, thus deteriorating the feel of the surface.

[0134] In addition, such as Figure 2 As shown, when the first chain tooth row 50 and the second chain tooth row 60 are engaged with each other, the back side 11 and back side 21 of the width direction end face 10b and the width direction end face 20b of the first zipper tape 10 and the second zipper tape 20 are separated from the first chain tooth row 50 and the second chain tooth row 60 (chain tooth 31) in the front and back directions, and the two are respectively divided to form a first space T1 and a second space T2.

[0135] By setting the first space T1 and the second space T2 as described above, when the first zipper tooth row 50 and the second zipper tooth row 60 are combined using the zipper head 40, the first zipper tape 10 and the second zipper tape 20 can be easily bent. Furthermore, the larger the first space T1 and the second space T2, the larger the contact area between the surfaces 13 and 23 of the width-direction end 10a and the width-direction end 20a of the first zipper tape 10 and the second zipper tape 20, which better suppresses the formation of gaps (middle partitions) between the first zipper tape 10 and the second zipper tape 20, thereby contributing to improved appearance or enhanced water resistance and waterproofing. Furthermore, the contact between the first zipper tape 10 and the second zipper tape 20 is less prone to breakage, thus easily maintaining its shape.

[0136] Furthermore, as described above, since the first zipper tape 10 and the second zipper tape 20 are made of fabric or woven material and have excellent softness, the tightness of the connection between the first zipper tooth row 50 and the second zipper tooth row 60 can be improved when they engage with each other. Additionally, the flexed state of the first zipper tape 10 and the second zipper tape 20 can be maintained. Therefore, the formation of gaps (middle partitions) between the first zipper tape 10 and the second zipper tape 20 can be suppressed, thereby contributing to improved appearance or enhanced water resistance and waterproofing. Moreover, if the first zipper tape 10 and the second zipper tape 20 are molded from resin or the like, it is difficult to form and maintain a flexed shape.

[0137] Figure 4 This is a cross-sectional view of the main part of the zipper in a modified example of the first embodiment, and it shows the state in which the first and second zipper teeth are engaged. Figure 3 In the example, with Figure 2 Compared to the previous example, the degree of compression at one end 10a in the width direction of the first zipper tape 10 and one end 20a in the width direction of the second zipper tape 20 is enhanced, and the contact area between the surface 13 of the first zipper tape 10 end 10a and the surface 23 of the second zipper tape 20 end 20a in the width direction is increased. Thus, by appropriately adjusting the contact area, requirements for waterproofing and water resistance can be met.

[0138] (Second Implementation)

[0139] Figure 5 This is a cross-sectional view of the main part of the zipper according to the second embodiment, and it is a diagram showing the state in which the first zipper teeth and the second zipper teeth are engaged. Figure 6is a main part cross-sectional view of the slide fastener of the second embodiment, and is a view showing a state in which the first chain row and the second chain row are separated. The slide fastener 1 of the second embodiment differs from the first embodiment in that the first water stop film 70 and the second water stop film 80 are provided on the first slide fastener tape 10 and the second slide fastener tape 20. The other structures of the second embodiment are the same as those of the first embodiment, and thus the explanation thereof is omitted or simplified by denoting the same symbols as those of the first embodiment in the drawings.

[0140] As shown in Figure 5 and Figure 6 , the slide fastener 1 of the second embodiment further includes the first water stop film 70 (first water stop layer) provided on the surface 13 of the first slide fastener tape 10 and the second water stop film 80 (second water stop layer) provided on the surface 23 of the second slide fastener tape 20. Thus, the slide fastener 1 of the present embodiment is a water stop slide fastener having water stop properties.

[0141] The left and right pair of the first water stop film 70 and the second water stop film 80 are each a long strip shape identical to the first slide fastener tape 10 and the second slide fastener tape 20, and have the back surface 71, 81 (first water stop main surface) and the surface 73, 83 (second water stop main surface) on the opposite side of the back surface 71, 81. The first water stop film 70 and the second water stop film 80 are formed so as to cover the entire surfaces 13, 23 of the first slide fastener tape 10 and the second slide fastener tape 20. In the present embodiment, the first water stop film 70 and the second water stop film 80 are substantially the same in the up-down dimension and the width dimension as the first slide fastener tape 10 and the second slide fastener tape 20.

[0142] The first water stop film 70 and the second water stop film 80 are formed by integrally joining the water stop layer such as a thermosetting polyurethane film and the surfaces 13, 23 of the first slide fastener tape 10 and the second slide fastener tape 20 to which the first chain row 50 and the second chain row 60 are sewn by using adhesion or welding. Here, the slide fastener 1 becomes a state in which the common water stop layer (first water stop film 70 and second water stop film 80) is integrally joined with the first slide fastener tape 10 and the second slide fastener tape 20.

[0143] Subsequently, a waterproofing agent is applied to the zipper 1 using the same method as described in the first embodiment. For example, the zipper teeth 3 and 5 can be guided by winding along the circumference of a guide roller (not shown), allowing them to continuously pass through a container filled with the waterproofing agent, thus impregnating them. In this process, the entire surface of the first zipper tape 10 and the second zipper tape 20, the first tooth row 50 and the second tooth row 60, the core thread 32, the stitching 33, and the waterproofing layers (first waterproofing membrane 70 and second waterproofing membrane 80) constituting the zipper teeth 3 and 5 is efficiently and effectively waterproofed. Next, the zipper teeth 3 and 5 are lifted from the container and continuously passed through a drying chamber, thereby first drying the waterproofing agent applied to the entire surface of the zipper teeth 3 and 5. Subsequently, the zipper teeth straps 3 and 5, after the waterproofing agent has dried, are continuously passed through a heat treatment chamber, thereby heat-treating the dried waterproofing agent. During this heat treatment, the waterproofing agent is fused and adhered to all substrates of the first zipper strap 10 and second zipper strap 20, the first zipper tooth row 50 and second zipper tooth row 60, the core thread 32, the stitching 33, and the waterproofing layer (first waterproofing membrane 70 and second waterproofing membrane 80).

[0144] Next, after the heat treatment, the zipper 1 is removed, and a cutting device such as a cutter is used to cut along the length of the meshing portion where the first chain teeth 50 and the second chain teeth 60 engage, separating the single waterproof layer (first waterproof membrane 70 and second waterproof membrane 80) that connects the left and right pairs of zipper chain straps 3 and zipper chain straps 5 into two parts. This forms the left and right pairs of first waterproof membranes 70 and second waterproof membranes 80.

[0145] like Figure 6 As shown, when the first chain tooth row 50 and the second chain tooth row 60 are separated, the width direction end 10a and width direction end 70a of the first zipper tape 10 and the first water-stop membrane 70 are separated from the width direction end 20a and width direction end 80a of the second zipper tape 20 and the second water-stop membrane 80.

[0146] like Figure 6 As shown, in the separated state of the first zipper tooth row 50 and the second zipper tooth row 60, the width-direction end 10a and width-direction end 70a of the first zipper tape 10 and the first waterproof membrane 70 extend further towards the second zipper tape 20 (width-direction end side) than the position O1 that forms the engagement center O of the first zipper tooth row 50 and the second zipper tooth row 60, and the width-direction end 20a and width-direction end 80a of the second zipper tape 20 and the second waterproof membrane 80 extend further towards the first zipper tape 10 (width-direction end side) than the position O2 that forms the engagement center O. That is, designed to... Figure 4When the first chain cord 50 and the second chain cord 60 are engaged as shown, the first zipper tape 10 and the second zipper tape 20 overlap the engagement center O, and the first water stop film 70 and the second water stop film 80 overlap the engagement center O. By configuring the first zipper tape 10 and the second zipper tape 20, the first water stop film 70 and the second water stop film 80, and the first chain cord 50 and the second chain cord 60 as described above, the first zipper tape 10 and the second zipper tape 20 and the first water stop film 70 and the second water stop film 80 can be bent into an arc shape and brought into close contact with each other when the first chain cord 50 and the second chain cord 60 are engaged as described later.

[0147] More specifically, in a state in which the first chain cord 50 and the second chain cord 60 are separated, the width direction one end surface 10b of the first zipper tape 10 and the width direction one end surface 70b of the first water stop film 70 are disposed on the second zipper tape 20 side (width direction one end side) than the position O1 which is the engagement center O, and the width direction one end surface 20b of the second zipper tape 20 and the width direction one end surface 80b of the second water stop film 80 are disposed on the first zipper tape 10 side (width direction one end side) than the position O2 which is the engagement center O.

[0148] The width direction one end surface 10b of the first zipper tape 10 and the width direction one end surface 70b of the first water stop film 70 can be disposed at a position overlapping at least a part of the engagement head portion 31a of the chain cord 31 in the width direction, can be disposed on the same plane S1 as the width direction one end surface 31e of the engagement head portion 31a (i.e., the width direction one end surface of the first chain cord 50), or can be disposed on the second zipper tape 20 side than the engagement head portion 31a. Figure 6 In the example of FIG. 6, the width direction one end surface 10b of the first zipper tape 10 and the width direction one end surface 70b of the first water stop film 70 are disposed on the same plane S1 as the width direction one end surface of the first chain cord 50 in the width direction.

[0149] The width direction one end surface 20b of the second zipper tape 20 and the width direction one end surface 80b of the second water stop film 80 can be disposed at a position overlapping at least a part of the engagement head portion 31a of the chain cord 31 in the width direction, can be disposed on the same plane S2 as the width direction one end surface 31f of the engagement head portion 31a (i.e., the width direction one end surface of the second chain cord 60), or can be disposed on the first zipper tape 10 side than the engagement head portion 31a. Figure 6 In the example of FIG. 6, the width direction one end surface 20b of the second zipper tape 20 is disposed on the same plane S2 as the width direction one end surface of the second chain cord 60 in the width direction.

[0150] Thus, the width-direction end faces 10b and 70b of the first zipper tape 10 and the first water-stop membrane 70, and the width-direction end face of the first chain tooth row 50 are arranged on the same plane S1, and the width-direction end faces 20b and 80b of the second zipper tape 20 and the second water-stop membrane 80, and the width-direction end face of the second chain tooth row 60 are arranged on the same plane S2. As a result, when the first chain tooth row 50 and the second chain tooth row 60 are engaged, the first zipper tape 10 and the second zipper tape 20, as well as the first water-stop membrane 70 and the second water-stop membrane 80, can be more reliably bent into an arc shape and closely connected to each other. The reason for this is the following configuration: the width-direction end 10a and width-direction end 20a of the first zipper tape 10 and the second zipper tape 20 do not obstruct the engagement of the first chain teeth 50 and the second chain teeth 60, and the pressing of the first zipper tape 10 and the second zipper tape 20 together is not prone to breakage. Furthermore, the phrase "configured on the same plane" does not necessarily mean they need to be completely on the same plane. Considering the taper of the engagement head 31a, it also includes the case where the width-direction end face of the zipper tape is approximately on the same plane as the range from the start point to the end point of the taper of the engagement head 31a.

[0151] By pulling the 40 from Figure 6 As shown, the first chain tooth 50 and the second chain tooth 60 are separated and move upwards, as... Figure 5 As shown, a pair of first chain teeth 50 and second chain teeth 60 engage. At this time, the width-direction ends 10a and 70a of the first zipper tape 10 and the first waterproof membrane 70 extend further towards the second zipper tape 20 (width-direction end) than the position O1 that forms the engagement center O of the first chain teeth 50 and the second chain teeth 60, and the width-direction ends 20a and 80a of the second zipper tape 20 and the second waterproof membrane 80 extend further towards the first zipper tape 10 (width-direction end) than the position O2 that forms the engagement center O. Therefore, the width-direction ends 10a and 70a and the width-direction ends 20a and 80a are squeezed and deformed against each other in the width direction, bending into an arc shape protruding towards the surface and closely contacting each other. In addition, at this time, as Figure 2 As shown, the seam 33 sewn onto the first zipper tape 10 and the second zipper tape 20, and onto the side of the first zipper tape 10 and the second zipper tape 20 at one end 10a and the other end 20a in the width direction, sometimes stretches slightly and floats up as the first zipper tape 10 and the second zipper tape 20 are compressed.

[0152] Thus, when the first zipper teeth 50 and the second zipper teeth 60 are engaged, the first zipper tape 10 and the second zipper tape 20, as well as the first waterproof membrane 70 and the second waterproof membrane 80, are in close contact with each other. Therefore, unlike existing reverse-mounted zippers, there is no gap (so-called middle partition) formed between the first zipper tape 10 and the second zipper tape 20, and between the first waterproof membrane 70 and the second waterproof membrane 80. Consequently, when the user observes the zipper 1 from the outside, the first zipper teeth 50 and the second zipper teeth 60 are not visible, resulting in an excellent appearance. This type of zipper 1 is particularly suitable for aesthetically pleasing items such as car seats, bags, and furniture.

[0153] Furthermore, since the first zipper tape 10 and the second zipper tape 20, as well as the first water-stopping membrane 70 and the second water-stopping membrane 80, are pressed into an arc shape and closely connected to each other, even when forces (so-called lateral pull) in directions away from each other are applied to the first zipper tape 10 and the second zipper tape 20, within the range where the meshing gaps of the zipper teeth 31 are offset, the close connection can be maintained by only slightly reducing the degree of pressing, thus maintaining the good appearance of the zipper 1.

[0154] When the first chain teeth 50 and the second chain teeth 60 are engaged with each other, the first zipper tape and the second zipper tape, as well as the first water-stop membrane 70 and the second water-stop membrane 80, are bent into an arc shape and closely connected to each other. Therefore, no gap (middle partition) is formed between the first zipper tape 10 and the second zipper tape 20 and the first water-stop membrane 70 and the second water-stop membrane 80, which can prevent liquid from entering from the middle partition as in the prior art.

[0155] In addition, such as Figure 5 As shown, when the first zipper tooth row 50 and the second zipper tooth row 60 are engaged, the width-direction end faces 10b and 20b of the first zipper tape 10 and the second zipper tape 20, as well as the width-direction end faces 70b and 80b of the first and second water-stop membranes 70 and 80, face the zipper tooth 31 side (back side). The width-direction end faces 70b and 80b of the first and second water-stop membranes 70 and 80 sometimes also abut against the first zipper tooth row 50 and the second zipper tooth row 60. Furthermore, the surface 73 of the width-direction end 70a of the first water-stop membrane 70 and the surface 83 of the width-direction end 80a of the second water-stop membrane 80 are in close contact at the engagement center O. Therefore, the liquid intrusion suppression effect can be improved.

[0156] Figure 7 This is a cross-sectional view of the main part of the zipper in a modified example of the second embodiment, and it shows the state in which the first and second rows of zipper teeth are engaged. Figure 7 In the example, with Figure 5In contrast to the example, the degree of bending of the widthwise end portion 10a of the first zipper tape 10 and the widthwise end portion 70a of the first waterstop film 70 and the widthwise end portion 20a of the second zipper tape 20 and the widthwise end portion 80a of the second waterstop film 80 is increased, and the pressure-bonding area of the surface 73 of the widthwise end portion 70a of the first waterstop film 70 and the surface 83 of the widthwise end portion 80a of the second waterstop film 80 is increased. In this way, by appropriately adjusting the pressure-bonding area, the waterstop property and the water resistance can be addressed.

[0157] Furthermore, the present application is not limited to the contents exemplified in the above-described embodiments, and can be appropriately changed without departing from the gist of the present application.

[0158] As described above, the following matters are disclosed in the present specification.

[0159] [1] A zipper 1 comprising:

[0160] a pair of first and second zipper tapes 10, 20 that are elongated and each have a first major surface 11, 21 and a second major surface 13, 23 on the opposite side of the first major surface 11, 21;

[0161] a first chain of teeth 50 provided on the first major surface 11 of the widthwise end portion 10a of the first zipper tape 10; and

[0162] a second chain of teeth 60 provided on the first major surface 21 of the widthwise end portion 20a of the second zipper tape 20, and in the zipper 1,

[0163] when the first and second chains of teeth 50, 60 are engaged with each other, the widthwise end portion 10a of the first zipper tape 10 and the widthwise end portion 20a of the second zipper tape 20 are each bent into an arcuate shape and are in close contact with each other.

[0164] According to the structure, since the first tape and the second tape 10, 20 are in close contact with each other at the time of engaging the first and second chain rows 50, 60 with each other, a gap (so-called middle partition) is not formed between the first and second tapes 10, 20 as in the case of the conventional reverse installation zipper. Therefore, when a user observes the zipper 1 from the surface side, the first and second chain rows 50, 60 cannot be visually recognized, and the appearance is excellent. Such a zipper 1 is particularly suitable for articles such as automobile seats, bags, furniture, and the like, in which appearance is valued. In addition, since the first and second tapes 10, 20 are in close contact with each other by being bent into an arc shape, even in the case where a force in a direction away from each other (so-called cross pull) is applied to the first and second tapes 10, 20, the engagement gap between the teeth 31, 31 is canceled within a range in which the degree of bending is slightly reduced, and the close contact state can be maintained, and thus the excellent appearance of the zipper 1 can be maintained.

[0165] [2] The zipper 1 according to [1], wherein

[0166] The second major surface 13 of the widthwise one end portion 10a of the first tape 10 and the second major surface 23 of the widthwise one end portion 20a of the second tape 20 are in close contact with each other at the time of engaging the first and second chain rows 50, 60 with each other.

[0167] According to the structure, since the second major surfaces 13, 23 of the widthwise one end portions 10a, 20a of the first and second tapes 10, 20 are in close contact with each other, the thickness of the zipper 1 can be suppressed compared to the case where the first major surfaces 11, 21 are in close contact with each other, and the sliding resistance of the slider 40 can be reduced.

[0168] [3] The zipper 1 according to [1] or [2], wherein

[0169] A first space T1 is formed between the first major surface 11 of the widthwise one end portion 10a of the first tape 10 and the first chain row 50 at the time of engaging the first and second chain rows 50, 60 with each other,

[0170] A second space T2 is formed between the first major surface 21 of the widthwise one end portion 20a of the second tape 20 and the second chain row 60.

[0171] According to the structure, by providing the first space and the second space T1, T2, the first zipper tape and the second zipper tape 10, 20 can be easily crimped when the first chain and the second chain 50, 60 are combined by the puller 40. In addition, the larger the first space and the second space T1, T2, the larger the crimping area of the first main surfaces 11, 21 of the width direction one end surface 10b and the width direction one end surface 20b of the first zipper tape and the second zipper tape 10, 20, the more the generation of the gap (middle partition) between the first zipper tape and the second zipper tape 10, 20 can be suppressed, thereby contributing to the improvement of the appearance or the improvement of the water stop property, the water resistance. Further, the crimping of the first zipper tape and the second zipper tape 10, 20 to each other is not easily broken, thereby easily maintaining the shape.

[0172] [4] The zipper 1 according to [1] or [2], wherein

[0173] The first zipper tape and the second zipper tape 10, 20 are fabric or braids.

[0174] According to the structure, since the first zipper tape and the second zipper tape 10, 20 are fabric or braids and excellent in softness, the close contact property of the first zipper tape and the second zipper tape 10, 20 can be improved when the first chain and the second chain 50, 60 are engaged with each other. In addition, the crimped state of the first zipper tape and the second zipper tape 10, 20 can be maintained. Therefore, the generation of the gap (middle partition) between the first zipper tape and the second zipper tape 10, 20 can be suppressed, thereby contributing to the improvement of the appearance or the improvement of the water stop property, the water resistance.

[0175] [5] The zipper 1 according to [1] or [2], wherein

[0176] The width direction one end portion 10a of the first zipper tape 10 extends more to the second zipper tape 20 side than the engagement center O of the first chain and the second chain 50, 60, and the width direction one end portion 20a of the second zipper tape 20 extends more to the first zipper tape 10 side than the engagement center O, whereby the width direction one end portion 10a of the first zipper tape 10 and the width direction one end portion 20a of the second zipper tape 20 are crimped into an arc shape and close contact with each other when the first chain and the second chain 50, 60 are engaged with each other.

[0177] According to the structure, by the arrangement relationship of the first chain and the second chain 50, 60 and the first zipper tape and the second zipper tape 10, 20, the first zipper tape and the second zipper tape 10, 20 can be crimped into an arc shape and close contact with each other when the first chain and the second chain 50, 60 are engaged with each other.

[0178] [6] The zipper 1 according to [5], wherein

[0179] The width direction one end surface 10b of the first zipper tape 10 and the width direction one end surface 31e of the first chain row 50 are arranged on the same plane S1, and the width direction one end surface 20b of the second zipper tape 20 and the width direction one end surface 31f of the second chain row 60 are arranged on the same plane S2, whereby when the first chain row and the second chain row 50, 60 are engaged with each other, the width direction one end portion 10a of the first zipper tape 10 and the width direction one end portion 20a of the second zipper tape 20 are pressed and curved into an arc shape to be in close contact with each other.

[0180] According to the structure, the first zipper tape and the second zipper tape 10, 20 can be more reliably pressed and curved into an arc shape to be in close contact with each other. The reason is as follows: the width direction one end portions 10a, 20a of the first zipper tape and the second zipper tape 10, 20 do not interfere with the engagement of the first chain row and the second chain row 50, 60 with each other, and the pressing of the first zipper tape and the second zipper tape 10, 20 with each other is not easily broken.

[0181] [7] The zipper 1 according to [1] or [2], comprising:

[0182] a first water stopping layer 70 provided on the second main surface 13 of the first zipper tape 10; and

[0183] a second water stopping layer 80 provided on the second main surface 23 of the second zipper tape 20.

[0184] According to the structure, the zipper 1 can be given water stopping property.

[0185] [8] The zipper 1 according to [7], wherein,

[0186] The width direction one end portion 70a of the first water stopping layer 70 and the width direction one end portion 80a of the second water stopping layer 80 are pressed and curved into an arc shape to be in close contact with each other when the first chain row and the second chain row 50, 60 are engaged with each other.

[0187] According to the structure, since the first zipper tape and the second zipper tape 10, 20 and the first water stopping layer and the second water stopping layer 70, 80 are in close contact with each other when the first chain row and the second chain row 50, 60 are engaged with each other, a gap (so-called middle partition) is not formed between the first zipper tape and the second zipper tape 10, 20 and the first water stopping layer and the second water stopping layer 70, 80 as in the existing reverse installation zipper 100. Therefore, when a user observes the zipper 1 from the surface side, the first chain row and the second chain row 50, 60 cannot be visually recognized, and the appearance is excellent. Such a zipper 1 is particularly suitable for articles such as automobile seats, bags, furniture, and the like, in which appearance is valued.

[0188] [9] The fastener 1 according to [8], wherein

[0189] The first and second waterstop layers 70, 80 each include a first waterstop main surface 71, 81 that is in contact with the second main surface 13, 23 of the first and second fastener tapes 10, 20, and a second waterstop main surface 73, 83 that is on the opposite side of the first waterstop main surface 71, 81,

[0190] The second waterstop main surface 73 of the widthwise one end portion 70a of the first waterstop layer 70 and the second waterstop main surface 83 of the widthwise one end portion 80a of the second waterstop layer 80 are in close contact with each other when the first and second rows of teeth 50, 60 are engaged with each other.

[0191] According to the structure, the liquid immersion suppression effect can be improved.

Claims

1. A slide fastener (1) characterized by, The zipper (1) includes: a pair of first and second zipper tapes (10, 20) each having a first major surface (11, 21) and a second major surface (13, 23) opposite to the first major surface (11, 21); a first chain row (50) provided on the first major surface (11) of the first zipper tape (10) at one end portion (10a) in a width direction of the first zipper tape (10); a second chain row (60) provided on the first major surface (21) of the second zipper tape (20) at one end portion (20a) in a width direction of the second zipper tape (20), and when the first chain row (50) and the second chain row (60) are engaged with each other, the one end portion (10a) in the width direction of the first zipper tape (10) and the one end portion (20a) in the width direction of the second zipper tape (20) are respectively bent into an arc shape to be in close contact with each other, and the second major surface (13) of the one end portion (10a) in the width direction of the first zipper tape (10) and the second major surface (23) of the one end portion (20a) in the width direction of the second zipper tape (20) are in close contact with each other. The first and second zipper tapes (10, 20) are fabric or knitted fabric.

2. The zipper (1) according to claim 1, wherein when the first chain row (50) and the second chain row (60) are engaged with each other, a first space (T1) is formed between the first major surface (11) of the one end portion (10a) in the width direction of the first zipper tape (10) and the first chain row (50), and a second space (T2) is formed between the first major surface (21) of the one end portion (20a) in the width direction of the second zipper tape (20) and the second chain row (60).

3. The zipper (1) according to claim 1, wherein the one end portion (10a) in the width direction of the first zipper tape (10) extends more toward the second zipper tape (20) than a center (O) of engagement of the first chain row (50) and the second chain row (60), and the one end portion (20a) in the width direction of the second zipper tape (20) extends more toward the first zipper tape (10) than the center (O) of engagement, whereby when the first chain row (50) and the second chain row (60) are engaged with each other, the one end portion (10a) in the width direction of the first zipper tape (10) and the one end portion (20a) in the width direction of the second zipper tape (20) are bent into an arc shape to be in close contact with each other.

4. The zipper (1) according to claim 3, wherein ​ A width direction one end surface (10b) of the first zipper tape (10) and a width direction one end surface (31e) of the first chain row (50) are arranged on the same first plane (S1), and a width direction one end surface (20b) of the second zipper tape (20) and a width direction one end surface (31f) of the second chain row (60) are arranged on the same second plane (S2), whereby when the first chain row (50) and the second chain row (60) are engaged with each other, the width direction one end (10a) of the first zipper tape (10) and the width direction one end (20a) of the second zipper tape (20) are pressed and curved into an arc shape and are in close contact with each other.

5. The zip fastener (1) according to claim 1, characterized in that Comprise: A first water stopping layer (70) provided on the second main surface (13) of the first zipper tape (10); and A second water stopping layer (80) provided on the second main surface (23) of the second zipper tape (20).

6. The zipper (1) according to claim 5, wherein When the first chain row (50) and the second chain row (60) are engaged with each other, a width direction one end (70a) of the first water stopping layer (70) and a width direction one end (80a) of the second water stopping layer (80) are pressed and curved into an arc shape and are in close contact with each other.

7. The zipper (1) according to claim 6, wherein The first water stopping layer (70) and the second water stopping layer (80) each comprise a first water stopping main surface (71, 81) which is in contact with the second main surface (13, 23) of the first zipper tape (10) and the second zipper tape (20), and a second water stopping main surface (73, 83) which is on the opposite side of the first water stopping main surface (71, 81), When the first chain row (50) and the second chain row (60) are engaged with each other, the second water stopping main surface (73) of the width direction one end (70a) of the first water stopping layer (70) and the second water stopping main surface (83) of the width direction one end (80a) of the second water stopping layer (80) are in close contact with each other. ​

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